The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1719
Hash: 169a9b1b383f026cb3f5639b47abb8572ee986f1306150ebc6d297d954991e03
Previous block: 1d55f72febd2a239691ad906ad337d9c73e2a8373ad43ae76f27d717e87247ee
Next block: 61555c82b8c96e3a10203be3847727d2ffb2e9dbe63d875b0a19fdec43780096
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159210
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: a8e5963620832c673f3716864d4b620aaff339b39ea258f2ead2074497cee397
Median time: 1719159209
Difficulty: 4.656542373906925e-10
Confirmations: 525
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d70
Bits: 207fffff